The last time Buenos Aires' Plaza de Mayo was this full came during the economic crisis of the early 2000s, when the cacerolazo filled the square with the noise of pots and pans, eventually prompting deadly clashes with the police in December 2001 and the fall of the government.
Now, thousands of protesters have returned with similar grievances aimed at President Cristina Kirchner, who was re-elected to her second term last year but faces a faltering economy.
She has restricted the importation of dollars, raised taxes and implemented an austerity plan. But for the leaderless protests, who emphasise that there is no top-down control, the opposition doesn't represent a popular alternative.
Al Jazeera's Adam Raney reports from Buenos Aires.